CONTROLLING SOLITON SELF-FREQUENCY SHIFT
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United States of America
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N/A
Issued Date -
Apr 3, 2025
app pub date -
Aug 28, 2024
filing date -
Aug 28, 2024
priority date (Note) -
Published
status (Latency Note)
Importance
Abstract
Embodiments herein describe using a birefringent element (e.g., a half-wave plate, full-wave plate, birefringent crystal, or metasurface) or a band-pass filter to reduce the laser line broadening induced by the soliton self-frequency shift. The birefringent element may a free space element that is part of the laser cavity. Due to dispersion, different frequencies (or colors) of light in the laser travel through the birefringent element at different speeds. This dispersion results in the birefringent element introducing slightly different polarization shifts for the different frequencies of light in the laser. When this light passes through a polarizer (which is set to filter out polarizations different from a desired polarization), the polarizer attenuates or extinguishes the frequencies that do not have the polarization of the design frequency of the birefringent element.
First Claim
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